Yes, they do carry good stuff. I have the McCulloch 5000k kit and I love it. There's an incredible amount of usable light compared to the higher temp kits. The lower the number 4300k-5000k is the most light output. The 4300, though, is a good bit more yellow than the 5000k. 5000 is pure white and is what I would recomend.
I also ride at night quite a bit. I love it. A lot less people/idiots out there. I just don't go on the back roads. I've met deer before while on the bike. Rather large pucker factor. Never hit one while riding, thankfully. However, I had one run into the right rear quarter panel while drivin home from my friend's house one night.